Yellow Nectria (aff. pallidula?)

01-06-2025 09:37

Octospora

Charles Aron

Hi All, I found this Octospora growing with liver

06-07-2025 19:36

Auda con esta

Castillo Joseba

me mandan el material de Galicia (España) recolec

05-07-2025 12:38

Pyrenomycetous fungi on dead Juniperus twig

Åge Oterhals

I found this pyrenomycetous fungi in pine forest o

04-07-2025 20:12

Black thready anamorph

Josep Torres

Hello.A fungus growing on the surface of a trunk o

20-06-2025 08:33

Ascomycete on a herbaceous stem.

Josep Torres

Hello.Small, blackish, mucronated surface grains s

28-06-2025 16:00

Salvia leaf parasite

Josep Torres

Hello.A tiny fungus shaped like globose black grai

04-07-2025 12:43

En tallo de herbaceas 1102

Castillo Joseba

me mandan el material seco de Galicia (España)

03-07-2025 18:40

Melampsora ??? en Salix

Castillo Joseba

me mandas el material seco de Galicia (España) re

03-07-2025 20:08

Yellowish asco on submerged Larix needles

Francois Guay

I found this interesting yellowish asco growing on

01-07-2025 23:37

Help with a Pleosporal.

Josep Torres

Hello.A Pleosporal symbiotic organism located and

Yellow Nectria (aff. pallidula?)

Edvin Johannesen, 18-01-2019 22:14

Dear all,

This nectriaceous species was growing erumpent on twigs of old, but living plum tree (Prunus). Ascospores measure ca. 13 x 4-6 microns, and become warted and 1-septate at maturity. Is this sufficient for identification or does it need further studies?

Christian Lechat, 19-01-2019 06:20

Re : Yellow Nectria (aff. pallidula?)

Hi Edvin,

maybe your fungus is Bionectria. Vertical section through ascomatal wall could be very useful as well as the reaction in KOH and lactic acid. Please, check if there is an asexual state on the substrate or around the stromata, which should be clonostachys-like.

All the best,

Christian

Edvin Johannesen, 19-01-2019 11:36

Re : Yellow Nectria (aff. pallidula?)

Thanks, Christian. Do you mean cotton blue or plain lactic acid (which I do not have)? What to look for? Do you have a good article on Bionectria? I have limited access to literature on the internet.

Best regards,

Edvin

Edvin Johannesen, 19-01-2019 13:47

Re : Yellow Nectria (aff. pallidula?)

The ascomatal wall appears two-layered; an outer yellow and an inner hyaline layer. I have also tested iodine reactions. Neither Barals (alone) or Lugol after pre-treatment with 3% KOH gave any detectable staining.